About

This tool is entirely in Javascript that runs on your browser.
There is no server-side to it at all. You can "View Source" and
save as a file named whatumissed.html to the local hard drive on your computer and
open it in your browser and edit or modify the script in any way
you like.

If you follow a large number of people, you can supply a
since_id parameter to the script to improve
performance. The "Refresh Since" link shown at the top of
the results uses this parameter for subsequent invocations of the
script, to only show updates since the last scan.

There is a variant of the script called topreplied.html
that shows only the top 5 most replied to users by your friends.